Where to advertise for Computer Scientists?

Could anyone help out and tell me where to advertise for computer scientists? Especially in the UK? Any advice greatly appreciated. I've included my job advert below if anyone is interested or is generous enough to offer some feedback:<p>"I own a small search marketing agency here in the UK and would like to recruit a computer scientist with experience working with software that intrinsically rely on complex algorithms. The salary I'm offering is £5000 ($8000) per month. (No benefits as it's a contractor role) It's a "contractor / freelance" position and once the project is complete (estimated 6 - 12 months) then I can't guarantee that the contract will be extended - especially if the tool doesn't work as intended or fails to become a revenue generator for my company.<p>I will also consider a single digit profit-share deal on any revenue that the tool generates. This is in addition to the monthly retainer. The rev-share deal isn't standard though and I’d only offer it to people that have significant experience or skills that will help develop this project faster than our anticipated projections. Work from home or your own office if you don't want to work from mine in the UK. The project is a linguistics based although no machine learning is required. Yay. All the tools and data currently exist for this tool to actually work, although none of them fit together to form a single entity. Some of the existing technologies have API’s some don’t – but there is no wheel inventing requirement as part of the project.<p>High output and stability is of the essence and the only way we can make the tool profitable is by having extremely high throughput rates with our orders. As such, I feel that any person that’s interested should have decent experience in C++ or Java, although, I'm open to suggestions as I’m not the expert ;)<p>Thanks for your advice in finding the right person Hacker News.<p>Chris Angus - Warlock Media